Commit | Line | Data |
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f523dd0d GL |
1 | /* |
2 | * Driver for MT9M001 CMOS Image Sensor from Micron | |
3 | * | |
4 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/videodev2.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/log2.h> | |
15 | ||
979ea1dd | 16 | #include <media/v4l2-subdev.h> |
f523dd0d GL |
17 | #include <media/v4l2-chip-ident.h> |
18 | #include <media/soc_camera.h> | |
19 | ||
5d28d525 GL |
20 | /* |
21 | * mt9m001 i2c address 0x5d | |
979ea1dd | 22 | * The platform has to define ctruct i2c_board_info objects and link to them |
5d28d525 GL |
23 | * from struct soc_camera_link |
24 | */ | |
f523dd0d GL |
25 | |
26 | /* mt9m001 selected register addresses */ | |
27 | #define MT9M001_CHIP_VERSION 0x00 | |
28 | #define MT9M001_ROW_START 0x01 | |
29 | #define MT9M001_COLUMN_START 0x02 | |
30 | #define MT9M001_WINDOW_HEIGHT 0x03 | |
31 | #define MT9M001_WINDOW_WIDTH 0x04 | |
32 | #define MT9M001_HORIZONTAL_BLANKING 0x05 | |
33 | #define MT9M001_VERTICAL_BLANKING 0x06 | |
34 | #define MT9M001_OUTPUT_CONTROL 0x07 | |
35 | #define MT9M001_SHUTTER_WIDTH 0x09 | |
36 | #define MT9M001_FRAME_RESTART 0x0b | |
37 | #define MT9M001_SHUTTER_DELAY 0x0c | |
38 | #define MT9M001_RESET 0x0d | |
39 | #define MT9M001_READ_OPTIONS1 0x1e | |
40 | #define MT9M001_READ_OPTIONS2 0x20 | |
41 | #define MT9M001_GLOBAL_GAIN 0x35 | |
42 | #define MT9M001_CHIP_ENABLE 0xF1 | |
43 | ||
6a6c8786 GL |
44 | #define MT9M001_MAX_WIDTH 1280 |
45 | #define MT9M001_MAX_HEIGHT 1024 | |
46 | #define MT9M001_MIN_WIDTH 48 | |
47 | #define MT9M001_MIN_HEIGHT 32 | |
48 | #define MT9M001_COLUMN_SKIP 20 | |
49 | #define MT9M001_ROW_SKIP 12 | |
50 | ||
760697be GL |
51 | /* MT9M001 has only one fixed colorspace per pixelcode */ |
52 | struct mt9m001_datafmt { | |
53 | enum v4l2_mbus_pixelcode code; | |
54 | enum v4l2_colorspace colorspace; | |
55 | }; | |
56 | ||
57 | /* Find a data format by a pixel code in an array */ | |
58 | static const struct mt9m001_datafmt *mt9m001_find_datafmt( | |
59 | enum v4l2_mbus_pixelcode code, const struct mt9m001_datafmt *fmt, | |
60 | int n) | |
61 | { | |
62 | int i; | |
63 | for (i = 0; i < n; i++) | |
64 | if (fmt[i].code == code) | |
65 | return fmt + i; | |
66 | ||
67 | return NULL; | |
68 | } | |
69 | ||
70 | static const struct mt9m001_datafmt mt9m001_colour_fmts[] = { | |
5d28d525 GL |
71 | /* |
72 | * Order important: first natively supported, | |
73 | * second supported with a GPIO extender | |
74 | */ | |
760697be GL |
75 | {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB}, |
76 | {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB}, | |
f523dd0d GL |
77 | }; |
78 | ||
760697be | 79 | static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = { |
bb55de3b | 80 | /* Order important - see above */ |
760697be GL |
81 | {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG}, |
82 | {V4L2_MBUS_FMT_GREY8_1X8, V4L2_COLORSPACE_JPEG}, | |
f523dd0d GL |
83 | }; |
84 | ||
85 | struct mt9m001 { | |
979ea1dd | 86 | struct v4l2_subdev subdev; |
6a6c8786 | 87 | struct v4l2_rect rect; /* Sensor window */ |
760697be GL |
88 | const struct mt9m001_datafmt *fmt; |
89 | const struct mt9m001_datafmt *fmts; | |
90 | int num_fmts; | |
f523dd0d | 91 | int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ |
96c75399 GL |
92 | unsigned int gain; |
93 | unsigned int exposure; | |
32536108 | 94 | unsigned short y_skip_top; /* Lines to skip at the top */ |
f523dd0d | 95 | unsigned char autoexposure; |
f523dd0d GL |
96 | }; |
97 | ||
979ea1dd GL |
98 | static struct mt9m001 *to_mt9m001(const struct i2c_client *client) |
99 | { | |
100 | return container_of(i2c_get_clientdata(client), struct mt9m001, subdev); | |
101 | } | |
102 | ||
9538e1c2 | 103 | static int reg_read(struct i2c_client *client, const u8 reg) |
f523dd0d | 104 | { |
f523dd0d GL |
105 | s32 data = i2c_smbus_read_word_data(client, reg); |
106 | return data < 0 ? data : swab16(data); | |
107 | } | |
108 | ||
9538e1c2 | 109 | static int reg_write(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
110 | const u16 data) |
111 | { | |
9538e1c2 | 112 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
f523dd0d GL |
113 | } |
114 | ||
9538e1c2 | 115 | static int reg_set(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
116 | const u16 data) |
117 | { | |
118 | int ret; | |
119 | ||
9538e1c2 | 120 | ret = reg_read(client, reg); |
f523dd0d GL |
121 | if (ret < 0) |
122 | return ret; | |
9538e1c2 | 123 | return reg_write(client, reg, ret | data); |
f523dd0d GL |
124 | } |
125 | ||
9538e1c2 | 126 | static int reg_clear(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
127 | const u16 data) |
128 | { | |
129 | int ret; | |
130 | ||
9538e1c2 | 131 | ret = reg_read(client, reg); |
f523dd0d GL |
132 | if (ret < 0) |
133 | return ret; | |
9538e1c2 | 134 | return reg_write(client, reg, ret & ~data); |
f523dd0d GL |
135 | } |
136 | ||
a4c56fd8 | 137 | static int mt9m001_init(struct i2c_client *client) |
f523dd0d GL |
138 | { |
139 | int ret; | |
140 | ||
85f8be68 | 141 | dev_dbg(&client->dev, "%s\n", __func__); |
f523dd0d | 142 | |
979ea1dd | 143 | /* |
96c75399 GL |
144 | * We don't know, whether platform provides reset, issue a soft reset |
145 | * too. This returns all registers to their default values. | |
979ea1dd GL |
146 | */ |
147 | ret = reg_write(client, MT9M001_RESET, 1); | |
148 | if (!ret) | |
149 | ret = reg_write(client, MT9M001_RESET, 0); | |
81034663 | 150 | |
11211641 GL |
151 | /* Disable chip, synchronous option update */ |
152 | if (!ret) | |
9538e1c2 | 153 | ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
f523dd0d | 154 | |
11211641 | 155 | return ret; |
f523dd0d GL |
156 | } |
157 | ||
979ea1dd | 158 | static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable) |
f523dd0d | 159 | { |
c4ce6d14 | 160 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
9538e1c2 | 161 | |
979ea1dd GL |
162 | /* Switch to master "normal" mode or stop sensor readout */ |
163 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0) | |
f523dd0d GL |
164 | return -EIO; |
165 | return 0; | |
166 | } | |
167 | ||
ad5f2e85 GL |
168 | static int mt9m001_set_bus_param(struct soc_camera_device *icd, |
169 | unsigned long flags) | |
f523dd0d | 170 | { |
40e2e092 | 171 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
36034dc3 | 172 | unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK; |
f523dd0d | 173 | |
36034dc3 SH |
174 | /* Only one width bit may be set */ |
175 | if (!is_power_of_2(width_flag)) | |
176 | return -EINVAL; | |
f523dd0d | 177 | |
36034dc3 SH |
178 | if (icl->set_bus_param) |
179 | return icl->set_bus_param(icl, width_flag); | |
f523dd0d | 180 | |
36034dc3 SH |
181 | /* |
182 | * Without board specific bus width settings we only support the | |
183 | * sensors native bus width | |
184 | */ | |
185 | if (width_flag == SOCAM_DATAWIDTH_10) | |
186 | return 0; | |
f523dd0d | 187 | |
36034dc3 | 188 | return -EINVAL; |
ad5f2e85 GL |
189 | } |
190 | ||
191 | static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) | |
192 | { | |
40e2e092 | 193 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
bd73b36f | 194 | /* MT9M001 has all capture_format parameters fixed */ |
e951cbf2 | 195 | unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING | |
bd73b36f | 196 | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | |
2d9329f3 | 197 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER; |
ad5f2e85 | 198 | |
36034dc3 SH |
199 | if (icl->query_bus_param) |
200 | flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK; | |
201 | else | |
202 | flags |= SOCAM_DATAWIDTH_10; | |
ad5f2e85 | 203 | |
bd73b36f | 204 | return soc_camera_apply_sensor_flags(icl, flags); |
ad5f2e85 GL |
205 | } |
206 | ||
08590b96 | 207 | static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
ad5f2e85 | 208 | { |
c4ce6d14 | 209 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 210 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
6a6c8786 | 211 | struct v4l2_rect rect = a->c; |
08590b96 | 212 | struct soc_camera_device *icd = client->dev.platform_data; |
ad5f2e85 GL |
213 | int ret; |
214 | const u16 hblank = 9, vblank = 25; | |
96c75399 | 215 | unsigned int total_h; |
ad5f2e85 | 216 | |
760697be | 217 | if (mt9m001->fmts == mt9m001_colour_fmts) |
6a6c8786 GL |
218 | /* |
219 | * Bayer format - even number of rows for simplicity, | |
220 | * but let the user play with the top row. | |
221 | */ | |
222 | rect.height = ALIGN(rect.height, 2); | |
223 | ||
224 | /* Datasheet requirement: see register description */ | |
225 | rect.width = ALIGN(rect.width, 2); | |
226 | rect.left = ALIGN(rect.left, 2); | |
227 | ||
228 | soc_camera_limit_side(&rect.left, &rect.width, | |
229 | MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH); | |
230 | ||
231 | soc_camera_limit_side(&rect.top, &rect.height, | |
232 | MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); | |
233 | ||
32536108 | 234 | total_h = rect.height + mt9m001->y_skip_top + vblank; |
96c75399 | 235 | |
f523dd0d | 236 | /* Blanking and start values - default... */ |
9538e1c2 | 237 | ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); |
11211641 | 238 | if (!ret) |
9538e1c2 | 239 | ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank); |
f523dd0d | 240 | |
5d28d525 GL |
241 | /* |
242 | * The caller provides a supported format, as verified per | |
243 | * call to icd->try_fmt() | |
244 | */ | |
11211641 | 245 | if (!ret) |
6a6c8786 | 246 | ret = reg_write(client, MT9M001_COLUMN_START, rect.left); |
11211641 | 247 | if (!ret) |
6a6c8786 | 248 | ret = reg_write(client, MT9M001_ROW_START, rect.top); |
11211641 | 249 | if (!ret) |
6a6c8786 | 250 | ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1); |
11211641 | 251 | if (!ret) |
9538e1c2 | 252 | ret = reg_write(client, MT9M001_WINDOW_HEIGHT, |
32536108 | 253 | rect.height + mt9m001->y_skip_top - 1); |
11211641 | 254 | if (!ret && mt9m001->autoexposure) { |
96c75399 | 255 | ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h); |
11211641 | 256 | if (!ret) { |
f523dd0d GL |
257 | const struct v4l2_queryctrl *qctrl = |
258 | soc_camera_find_qctrl(icd->ops, | |
259 | V4L2_CID_EXPOSURE); | |
96c75399 GL |
260 | mt9m001->exposure = (524 + (total_h - 1) * |
261 | (qctrl->maximum - qctrl->minimum)) / | |
f523dd0d GL |
262 | 1048 + qctrl->minimum; |
263 | } | |
264 | } | |
265 | ||
6a6c8786 GL |
266 | if (!ret) |
267 | mt9m001->rect = rect; | |
268 | ||
11211641 | 269 | return ret; |
f523dd0d GL |
270 | } |
271 | ||
6a6c8786 GL |
272 | static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
273 | { | |
c4ce6d14 | 274 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 GL |
275 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
276 | ||
277 | a->c = mt9m001->rect; | |
278 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
284 | { | |
285 | a->bounds.left = MT9M001_COLUMN_SKIP; | |
286 | a->bounds.top = MT9M001_ROW_SKIP; | |
287 | a->bounds.width = MT9M001_MAX_WIDTH; | |
288 | a->bounds.height = MT9M001_MAX_HEIGHT; | |
289 | a->defrect = a->bounds; | |
290 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
291 | a->pixelaspect.numerator = 1; | |
292 | a->pixelaspect.denominator = 1; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
760697be GL |
297 | static int mt9m001_g_fmt(struct v4l2_subdev *sd, |
298 | struct v4l2_mbus_framefmt *mf) | |
6a6c8786 | 299 | { |
c4ce6d14 | 300 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 | 301 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
6a6c8786 | 302 | |
760697be GL |
303 | mf->width = mt9m001->rect.width; |
304 | mf->height = mt9m001->rect.height; | |
305 | mf->code = mt9m001->fmt->code; | |
306 | mf->colorspace = mt9m001->fmt->colorspace; | |
307 | mf->field = V4L2_FIELD_NONE; | |
6a6c8786 GL |
308 | |
309 | return 0; | |
310 | } | |
311 | ||
760697be GL |
312 | static int mt9m001_s_fmt(struct v4l2_subdev *sd, |
313 | struct v4l2_mbus_framefmt *mf) | |
09e231b3 | 314 | { |
c4ce6d14 | 315 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 | 316 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
08590b96 GL |
317 | struct v4l2_crop a = { |
318 | .c = { | |
6a6c8786 GL |
319 | .left = mt9m001->rect.left, |
320 | .top = mt9m001->rect.top, | |
760697be GL |
321 | .width = mf->width, |
322 | .height = mf->height, | |
08590b96 | 323 | }, |
09e231b3 | 324 | }; |
6a6c8786 | 325 | int ret; |
09e231b3 GL |
326 | |
327 | /* No support for scaling so far, just crop. TODO: use skipping */ | |
6a6c8786 GL |
328 | ret = mt9m001_s_crop(sd, &a); |
329 | if (!ret) { | |
760697be GL |
330 | mf->width = mt9m001->rect.width; |
331 | mf->height = mt9m001->rect.height; | |
332 | mt9m001->fmt = mt9m001_find_datafmt(mf->code, | |
333 | mt9m001->fmts, mt9m001->num_fmts); | |
334 | mf->colorspace = mt9m001->fmt->colorspace; | |
6a6c8786 GL |
335 | } |
336 | ||
337 | return ret; | |
09e231b3 GL |
338 | } |
339 | ||
760697be GL |
340 | static int mt9m001_try_fmt(struct v4l2_subdev *sd, |
341 | struct v4l2_mbus_framefmt *mf) | |
f523dd0d | 342 | { |
c4ce6d14 | 343 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
32536108 | 344 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
760697be | 345 | const struct mt9m001_datafmt *fmt; |
64f5905e | 346 | |
760697be | 347 | v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH, |
6a6c8786 | 348 | MT9M001_MAX_WIDTH, 1, |
760697be | 349 | &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top, |
32536108 | 350 | MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0); |
6a6c8786 | 351 | |
760697be GL |
352 | if (mt9m001->fmts == mt9m001_colour_fmts) |
353 | mf->height = ALIGN(mf->height - 1, 2); | |
354 | ||
355 | fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts, | |
356 | mt9m001->num_fmts); | |
357 | if (!fmt) { | |
358 | fmt = mt9m001->fmt; | |
359 | mf->code = fmt->code; | |
360 | } | |
361 | ||
362 | mf->colorspace = fmt->colorspace; | |
f523dd0d GL |
363 | |
364 | return 0; | |
365 | } | |
366 | ||
979ea1dd GL |
367 | static int mt9m001_g_chip_ident(struct v4l2_subdev *sd, |
368 | struct v4l2_dbg_chip_ident *id) | |
f523dd0d | 369 | { |
c4ce6d14 | 370 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 371 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
f523dd0d | 372 | |
aecde8b5 | 373 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
f523dd0d GL |
374 | return -EINVAL; |
375 | ||
40e2e092 | 376 | if (id->match.addr != client->addr) |
f523dd0d GL |
377 | return -ENODEV; |
378 | ||
379 | id->ident = mt9m001->model; | |
380 | id->revision = 0; | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
386 | static int mt9m001_g_register(struct v4l2_subdev *sd, |
387 | struct v4l2_dbg_register *reg) | |
f523dd0d | 388 | { |
c4ce6d14 | 389 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
f523dd0d | 390 | |
aecde8b5 | 391 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
392 | return -EINVAL; |
393 | ||
9538e1c2 | 394 | if (reg->match.addr != client->addr) |
f523dd0d GL |
395 | return -ENODEV; |
396 | ||
aecde8b5 | 397 | reg->size = 2; |
9538e1c2 | 398 | reg->val = reg_read(client, reg->reg); |
f523dd0d GL |
399 | |
400 | if (reg->val > 0xffff) | |
401 | return -EIO; | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
979ea1dd GL |
406 | static int mt9m001_s_register(struct v4l2_subdev *sd, |
407 | struct v4l2_dbg_register *reg) | |
f523dd0d | 408 | { |
c4ce6d14 | 409 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
f523dd0d | 410 | |
aecde8b5 | 411 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
412 | return -EINVAL; |
413 | ||
9538e1c2 | 414 | if (reg->match.addr != client->addr) |
f523dd0d GL |
415 | return -ENODEV; |
416 | ||
9538e1c2 | 417 | if (reg_write(client, reg->reg, reg->val) < 0) |
f523dd0d GL |
418 | return -EIO; |
419 | ||
420 | return 0; | |
421 | } | |
422 | #endif | |
423 | ||
4407a463 | 424 | static const struct v4l2_queryctrl mt9m001_controls[] = { |
f523dd0d GL |
425 | { |
426 | .id = V4L2_CID_VFLIP, | |
427 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
428 | .name = "Flip Vertically", | |
429 | .minimum = 0, | |
430 | .maximum = 1, | |
431 | .step = 1, | |
432 | .default_value = 0, | |
433 | }, { | |
434 | .id = V4L2_CID_GAIN, | |
435 | .type = V4L2_CTRL_TYPE_INTEGER, | |
436 | .name = "Gain", | |
437 | .minimum = 0, | |
438 | .maximum = 127, | |
439 | .step = 1, | |
440 | .default_value = 64, | |
441 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
442 | }, { | |
443 | .id = V4L2_CID_EXPOSURE, | |
444 | .type = V4L2_CTRL_TYPE_INTEGER, | |
445 | .name = "Exposure", | |
446 | .minimum = 1, | |
447 | .maximum = 255, | |
448 | .step = 1, | |
449 | .default_value = 255, | |
450 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
451 | }, { | |
452 | .id = V4L2_CID_EXPOSURE_AUTO, | |
453 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
454 | .name = "Automatic Exposure", | |
455 | .minimum = 0, | |
456 | .maximum = 1, | |
457 | .step = 1, | |
458 | .default_value = 1, | |
459 | } | |
460 | }; | |
461 | ||
f523dd0d | 462 | static struct soc_camera_ops mt9m001_ops = { |
ad5f2e85 GL |
463 | .set_bus_param = mt9m001_set_bus_param, |
464 | .query_bus_param = mt9m001_query_bus_param, | |
f523dd0d GL |
465 | .controls = mt9m001_controls, |
466 | .num_controls = ARRAY_SIZE(mt9m001_controls), | |
f523dd0d GL |
467 | }; |
468 | ||
979ea1dd | 469 | static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 470 | { |
c4ce6d14 | 471 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 472 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
f523dd0d GL |
473 | int data; |
474 | ||
475 | switch (ctrl->id) { | |
476 | case V4L2_CID_VFLIP: | |
9538e1c2 | 477 | data = reg_read(client, MT9M001_READ_OPTIONS2); |
f523dd0d GL |
478 | if (data < 0) |
479 | return -EIO; | |
480 | ctrl->value = !!(data & 0x8000); | |
481 | break; | |
482 | case V4L2_CID_EXPOSURE_AUTO: | |
483 | ctrl->value = mt9m001->autoexposure; | |
484 | break; | |
96c75399 GL |
485 | case V4L2_CID_GAIN: |
486 | ctrl->value = mt9m001->gain; | |
487 | break; | |
488 | case V4L2_CID_EXPOSURE: | |
489 | ctrl->value = mt9m001->exposure; | |
490 | break; | |
f523dd0d GL |
491 | } |
492 | return 0; | |
493 | } | |
494 | ||
979ea1dd | 495 | static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 496 | { |
c4ce6d14 | 497 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd GL |
498 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
499 | struct soc_camera_device *icd = client->dev.platform_data; | |
f523dd0d GL |
500 | const struct v4l2_queryctrl *qctrl; |
501 | int data; | |
502 | ||
503 | qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id); | |
504 | ||
505 | if (!qctrl) | |
506 | return -EINVAL; | |
507 | ||
508 | switch (ctrl->id) { | |
509 | case V4L2_CID_VFLIP: | |
510 | if (ctrl->value) | |
9538e1c2 | 511 | data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d | 512 | else |
9538e1c2 | 513 | data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d GL |
514 | if (data < 0) |
515 | return -EIO; | |
516 | break; | |
517 | case V4L2_CID_GAIN: | |
518 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
519 | return -EINVAL; | |
520 | /* See Datasheet Table 7, Gain settings. */ | |
521 | if (ctrl->value <= qctrl->default_value) { | |
522 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
523 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
524 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
525 | ||
85f8be68 | 526 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 527 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
f523dd0d GL |
528 | if (data < 0) |
529 | return -EIO; | |
530 | } else { | |
531 | /* Pack it into 1.125..15 variable step, register values 9..67 */ | |
532 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ | |
533 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
534 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * | |
535 | 111 + range / 2) / range + 9; | |
536 | ||
537 | if (gain <= 32) | |
538 | data = gain; | |
539 | else if (gain <= 64) | |
540 | data = ((gain - 32) * 16 + 16) / 32 + 80; | |
541 | else | |
542 | data = ((gain - 64) * 7 + 28) / 56 + 96; | |
543 | ||
85f8be68 | 544 | dev_dbg(&client->dev, "Setting gain from %d to %d\n", |
9538e1c2 GL |
545 | reg_read(client, MT9M001_GLOBAL_GAIN), data); |
546 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); | |
f523dd0d GL |
547 | if (data < 0) |
548 | return -EIO; | |
549 | } | |
550 | ||
551 | /* Success */ | |
96c75399 | 552 | mt9m001->gain = ctrl->value; |
f523dd0d GL |
553 | break; |
554 | case V4L2_CID_EXPOSURE: | |
555 | /* mt9m001 has maximum == default */ | |
556 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
557 | return -EINVAL; | |
558 | else { | |
559 | unsigned long range = qctrl->maximum - qctrl->minimum; | |
560 | unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
561 | range / 2) / range + 1; | |
562 | ||
85f8be68 GL |
563 | dev_dbg(&client->dev, |
564 | "Setting shutter width from %d to %lu\n", | |
565 | reg_read(client, MT9M001_SHUTTER_WIDTH), | |
566 | shutter); | |
9538e1c2 | 567 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) |
f523dd0d | 568 | return -EIO; |
96c75399 | 569 | mt9m001->exposure = ctrl->value; |
f523dd0d GL |
570 | mt9m001->autoexposure = 0; |
571 | } | |
572 | break; | |
573 | case V4L2_CID_EXPOSURE_AUTO: | |
574 | if (ctrl->value) { | |
575 | const u16 vblank = 25; | |
96c75399 | 576 | unsigned int total_h = mt9m001->rect.height + |
32536108 | 577 | mt9m001->y_skip_top + vblank; |
a0705b07 | 578 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, |
96c75399 | 579 | total_h) < 0) |
f523dd0d GL |
580 | return -EIO; |
581 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
96c75399 GL |
582 | mt9m001->exposure = (524 + (total_h - 1) * |
583 | (qctrl->maximum - qctrl->minimum)) / | |
f523dd0d GL |
584 | 1048 + qctrl->minimum; |
585 | mt9m001->autoexposure = 1; | |
586 | } else | |
587 | mt9m001->autoexposure = 0; | |
588 | break; | |
589 | } | |
590 | return 0; | |
591 | } | |
592 | ||
5d28d525 GL |
593 | /* |
594 | * Interface active, can use i2c. If it fails, it can indeed mean, that | |
595 | * this wasn't our capture interface, so, we wait for the right one | |
596 | */ | |
40e2e092 GL |
597 | static int mt9m001_video_probe(struct soc_camera_device *icd, |
598 | struct i2c_client *client) | |
f523dd0d | 599 | { |
979ea1dd | 600 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 601 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 602 | s32 data; |
36034dc3 | 603 | unsigned long flags; |
a4c56fd8 | 604 | int ret; |
f523dd0d | 605 | |
5d28d525 GL |
606 | /* |
607 | * We must have a parent by now. And it cannot be a wrong one. | |
608 | * So this entire test is completely redundant. | |
609 | */ | |
f523dd0d GL |
610 | if (!icd->dev.parent || |
611 | to_soc_camera_host(icd->dev.parent)->nr != icd->iface) | |
612 | return -ENODEV; | |
613 | ||
614 | /* Enable the chip */ | |
9538e1c2 | 615 | data = reg_write(client, MT9M001_CHIP_ENABLE, 1); |
85f8be68 | 616 | dev_dbg(&client->dev, "write: %d\n", data); |
f523dd0d GL |
617 | |
618 | /* Read out the chip version register */ | |
9538e1c2 | 619 | data = reg_read(client, MT9M001_CHIP_VERSION); |
f523dd0d GL |
620 | |
621 | /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ | |
622 | switch (data) { | |
623 | case 0x8411: | |
624 | case 0x8421: | |
625 | mt9m001->model = V4L2_IDENT_MT9M001C12ST; | |
760697be | 626 | mt9m001->fmts = mt9m001_colour_fmts; |
f523dd0d GL |
627 | break; |
628 | case 0x8431: | |
629 | mt9m001->model = V4L2_IDENT_MT9M001C12STM; | |
760697be | 630 | mt9m001->fmts = mt9m001_monochrome_fmts; |
f523dd0d GL |
631 | break; |
632 | default: | |
85f8be68 | 633 | dev_err(&client->dev, |
f523dd0d | 634 | "No MT9M001 chip detected, register read %x\n", data); |
40e2e092 | 635 | return -ENODEV; |
f523dd0d GL |
636 | } |
637 | ||
760697be | 638 | mt9m001->num_fmts = 0; |
36034dc3 SH |
639 | |
640 | /* | |
641 | * This is a 10bit sensor, so by default we only allow 10bit. | |
642 | * The platform may support different bus widths due to | |
643 | * different routing of the data lines. | |
644 | */ | |
645 | if (icl->query_bus_param) | |
646 | flags = icl->query_bus_param(icl); | |
647 | else | |
648 | flags = SOCAM_DATAWIDTH_10; | |
649 | ||
650 | if (flags & SOCAM_DATAWIDTH_10) | |
760697be | 651 | mt9m001->num_fmts++; |
36034dc3 | 652 | else |
760697be | 653 | mt9m001->fmts++; |
36034dc3 SH |
654 | |
655 | if (flags & SOCAM_DATAWIDTH_8) | |
760697be | 656 | mt9m001->num_fmts++; |
36034dc3 | 657 | |
760697be | 658 | mt9m001->fmt = &mt9m001->fmts[0]; |
6a6c8786 | 659 | |
85f8be68 | 660 | dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, |
f523dd0d GL |
661 | data == 0x8431 ? "C12STM" : "C12ST"); |
662 | ||
a4c56fd8 GL |
663 | ret = mt9m001_init(client); |
664 | if (ret < 0) | |
665 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
666 | ||
96c75399 GL |
667 | /* mt9m001_init() has reset the chip, returning registers to defaults */ |
668 | mt9m001->gain = 64; | |
669 | mt9m001->exposure = 255; | |
670 | ||
a4c56fd8 | 671 | return ret; |
f523dd0d GL |
672 | } |
673 | ||
674 | static void mt9m001_video_remove(struct soc_camera_device *icd) | |
675 | { | |
40e2e092 | 676 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 677 | |
6a6c8786 | 678 | dev_dbg(&icd->dev, "Video removed: %p, %p\n", |
a85bdace | 679 | icd->dev.parent, icd->vdev); |
594bb46d GL |
680 | if (icl->free_bus) |
681 | icl->free_bus(icl); | |
f523dd0d GL |
682 | } |
683 | ||
32536108 GL |
684 | static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
685 | { | |
c4ce6d14 | 686 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
32536108 GL |
687 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
688 | ||
689 | *lines = mt9m001->y_skip_top; | |
690 | ||
691 | return 0; | |
692 | } | |
693 | ||
979ea1dd GL |
694 | static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { |
695 | .g_ctrl = mt9m001_g_ctrl, | |
696 | .s_ctrl = mt9m001_s_ctrl, | |
697 | .g_chip_ident = mt9m001_g_chip_ident, | |
698 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
699 | .g_register = mt9m001_g_register, | |
700 | .s_register = mt9m001_s_register, | |
701 | #endif | |
702 | }; | |
703 | ||
3805f201 | 704 | static int mt9m001_enum_fmt(struct v4l2_subdev *sd, unsigned int index, |
760697be GL |
705 | enum v4l2_mbus_pixelcode *code) |
706 | { | |
c4ce6d14 | 707 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
760697be GL |
708 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
709 | ||
3805f201 | 710 | if (index >= mt9m001->num_fmts) |
760697be GL |
711 | return -EINVAL; |
712 | ||
713 | *code = mt9m001->fmts[index].code; | |
714 | return 0; | |
715 | } | |
716 | ||
979ea1dd GL |
717 | static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = { |
718 | .s_stream = mt9m001_s_stream, | |
760697be GL |
719 | .s_mbus_fmt = mt9m001_s_fmt, |
720 | .g_mbus_fmt = mt9m001_g_fmt, | |
721 | .try_mbus_fmt = mt9m001_try_fmt, | |
08590b96 | 722 | .s_crop = mt9m001_s_crop, |
6a6c8786 GL |
723 | .g_crop = mt9m001_g_crop, |
724 | .cropcap = mt9m001_cropcap, | |
760697be | 725 | .enum_mbus_fmt = mt9m001_enum_fmt, |
979ea1dd GL |
726 | }; |
727 | ||
32536108 GL |
728 | static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = { |
729 | .g_skip_top_lines = mt9m001_g_skip_top_lines, | |
730 | }; | |
731 | ||
979ea1dd GL |
732 | static struct v4l2_subdev_ops mt9m001_subdev_ops = { |
733 | .core = &mt9m001_subdev_core_ops, | |
734 | .video = &mt9m001_subdev_video_ops, | |
32536108 | 735 | .sensor = &mt9m001_subdev_sensor_ops, |
979ea1dd GL |
736 | }; |
737 | ||
d2653e92 JD |
738 | static int mt9m001_probe(struct i2c_client *client, |
739 | const struct i2c_device_id *did) | |
f523dd0d GL |
740 | { |
741 | struct mt9m001 *mt9m001; | |
40e2e092 | 742 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 743 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
40e2e092 | 744 | struct soc_camera_link *icl; |
f523dd0d GL |
745 | int ret; |
746 | ||
40e2e092 GL |
747 | if (!icd) { |
748 | dev_err(&client->dev, "MT9M001: missing soc-camera data!\n"); | |
749 | return -EINVAL; | |
750 | } | |
751 | ||
752 | icl = to_soc_camera_link(icd); | |
f523dd0d GL |
753 | if (!icl) { |
754 | dev_err(&client->dev, "MT9M001 driver needs platform data\n"); | |
755 | return -EINVAL; | |
756 | } | |
757 | ||
758 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
759 | dev_warn(&adapter->dev, | |
760 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
761 | return -EIO; | |
762 | } | |
763 | ||
764 | mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL); | |
765 | if (!mt9m001) | |
766 | return -ENOMEM; | |
767 | ||
979ea1dd | 768 | v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); |
f523dd0d GL |
769 | |
770 | /* Second stage probe - when a capture adapter is there */ | |
a0705b07 | 771 | icd->ops = &mt9m001_ops; |
6a6c8786 | 772 | |
32536108 | 773 | mt9m001->y_skip_top = 0; |
6a6c8786 GL |
774 | mt9m001->rect.left = MT9M001_COLUMN_SKIP; |
775 | mt9m001->rect.top = MT9M001_ROW_SKIP; | |
776 | mt9m001->rect.width = MT9M001_MAX_WIDTH; | |
777 | mt9m001->rect.height = MT9M001_MAX_HEIGHT; | |
778 | ||
5d28d525 GL |
779 | /* |
780 | * Simulated autoexposure. If enabled, we calculate shutter width | |
781 | * ourselves in the driver based on vertical blanking and frame width | |
782 | */ | |
f523dd0d GL |
783 | mt9m001->autoexposure = 1; |
784 | ||
40e2e092 GL |
785 | ret = mt9m001_video_probe(icd, client); |
786 | if (ret) { | |
787 | icd->ops = NULL; | |
40e2e092 GL |
788 | kfree(mt9m001); |
789 | } | |
f523dd0d | 790 | |
f523dd0d GL |
791 | return ret; |
792 | } | |
793 | ||
794 | static int mt9m001_remove(struct i2c_client *client) | |
795 | { | |
979ea1dd | 796 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 797 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 798 | |
40e2e092 GL |
799 | icd->ops = NULL; |
800 | mt9m001_video_remove(icd); | |
40e2e092 | 801 | client->driver = NULL; |
f523dd0d GL |
802 | kfree(mt9m001); |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
3760f736 JD |
807 | static const struct i2c_device_id mt9m001_id[] = { |
808 | { "mt9m001", 0 }, | |
809 | { } | |
810 | }; | |
811 | MODULE_DEVICE_TABLE(i2c, mt9m001_id); | |
812 | ||
f523dd0d GL |
813 | static struct i2c_driver mt9m001_i2c_driver = { |
814 | .driver = { | |
815 | .name = "mt9m001", | |
816 | }, | |
817 | .probe = mt9m001_probe, | |
818 | .remove = mt9m001_remove, | |
3760f736 | 819 | .id_table = mt9m001_id, |
f523dd0d GL |
820 | }; |
821 | ||
822 | static int __init mt9m001_mod_init(void) | |
823 | { | |
824 | return i2c_add_driver(&mt9m001_i2c_driver); | |
825 | } | |
826 | ||
827 | static void __exit mt9m001_mod_exit(void) | |
828 | { | |
829 | i2c_del_driver(&mt9m001_i2c_driver); | |
830 | } | |
831 | ||
832 | module_init(mt9m001_mod_init); | |
833 | module_exit(mt9m001_mod_exit); | |
834 | ||
835 | MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); | |
836 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
837 | MODULE_LICENSE("GPL"); |